Forum: Early V8 (1932-53)
05-20-2024, 02:53 PM
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Replies: 46
Views: 16,693
Re: Isky 3/4 Max 1 Camshaft
On strokers in the Harley-Davidson flathead engines: I have some comments in Word .doc form, email me for copy.
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Forum: Early V8 (1932-53)
05-20-2024, 02:20 PM
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Replies: 24
Views: 936
Re: 13/4 intake
"I use the 1.72 Chevy builds in the street engines instead of a cam.... adds a little more air, but doesn't kill low end torque""
I agree
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Forum: Early V8 (1932-53)
05-13-2024, 05:23 PM
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Replies: 10
Views: 549
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Forum: Early V8 (1932-53)
05-03-2024, 08:16 PM
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Replies: 72
Views: 27,590
Re: Isky 404A cam - Harley Davidson grind?
It appears that some performance cams for the Ford have fairly late intake valve closure ABDC. IMHO this is done for a good compromise between torque and peak power.
Engines with relatively low...
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Forum: Early V8 (1932-53)
05-03-2024, 08:10 PM
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Replies: 58
Views: 16,794
Re: Relieving 8BA Block
The KR comparison is a bit misleading. The engine has a low bore to stroke ratio, which gives good compression (compared to the reverse): 2.745" bore by 3.8125" stroke.
However, the valve seats...
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Forum: Early V8 (1932-53)
05-03-2024, 07:57 PM
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Replies: 19
Views: 1,633
Re: Compression and flow
Mistake in the video: the intake valve closes AFTER the piston reaches the bottom of the stroke (ABDC).
IMHO minimum safe piston to head clearance is .035".
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Forum: Early V8 (1932-53)
05-03-2024, 07:50 PM
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Replies: 17
Views: 1,190
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Forum: Early V8 (1932-53)
05-03-2024, 07:44 PM
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Replies: 25
Views: 4,053
Re: dirty oil. Why so quick
Running with the choke on too long or rich cruising (high vacuum, low throttle) mixture puts carbon in the oil
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Forum: Early V8 (1932-53)
05-02-2024, 11:23 AM
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Replies: 72
Views: 27,590
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Forum: Early V8 (1932-53)
04-27-2024, 04:32 PM
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Replies: 58
Views: 16,794
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Forum: Early V8 (1932-53)
04-27-2024, 04:06 PM
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Replies: 12
Views: 5,866
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Forum: Early V8 (1932-53)
04-22-2024, 07:45 PM
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Replies: 72
Views: 27,590
Re: Isky 404A cam - Harley Davidson grind?
I have found that the low CR of the KR race engines required very strange cam events.
A sample:
Intake duration 310°
Opens 65° BTDC
Closes 65° ABDC
Intake CL 90° ATDC
The exhausts are all 30°...
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Forum: Early V8 (1932-53)
04-22-2024, 07:29 PM
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Replies: 72
Views: 27,590
Re: Isky 404A cam - Harley Davidson grind?
The 1929-73 Harley-Davidson 4-cam flathead engines: small engine VINs are D, R, W, G, K & X, big engines are V & U (750, 900, 1200 & 1300cc)
The 1936-2000 single-cam pushrod OHV engines: a.k.a....
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Forum: Early V8 (1932-53)
04-22-2024, 12:10 PM
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Replies: 19
Views: 1,633
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Forum: Early V8 (1932-53)
05-11-2020, 05:00 PM
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Replies: 58
Views: 16,794
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Forum: Early V8 (1932-53)
05-11-2020, 01:52 PM
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Replies: 58
Views: 16,794
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